Double impeller impact breaker



1954 N. H. KESSLER ET AL 2,665,074

DOUBLE IMPELLER IMPACT BREAKER Filed Aug. 3, 1950 2 Sheets-Sheet l INVENTORS NORMAN H. KESSLER FIG. 3 BY HANS I. HANSEN ATTOKNEY.

Jan. 5, 1954 Filed Aug. 5, 1950 FlG.4.

2 Sheets-Sheet 2 INVENTORS NORMAN H.KE55LER HANS L HANS N BY mfla ATTORNEY.

cation of the Patented Jan. 5, 1954 UNITED STATES PATENT OFFICE DOUBLE IMPELLER IMPACT BREAKER Norman H.'Kessler and Hans J. iHansen,.Cedar Rapids, Iowa, assignors to Lee H. Kessler,

Springville, N..Y.

2 Claims.

In the fabrication of aggregates or the crushing "of ores or rock products, it is important tobe able to control the crushed. material gradation or to compensate for an over or undersupply of fines or for an off-gradation of one of the s zes the specification. An object of our invention is to provide a simplified construction of such controlling means and more particularly to pro vide means for the adjustment of therelative loimpellers in a plane parallel to a plane passing through the centerline-ef the two impeller'shaits.

Another object is to provide-an adjustment of the end spacing between the impeller impact blades of the two impellers from-approximately half an inch'to approximately six inches in-order to control the baiiiing of the downward moving material.

Still another object of our invention is to provide an end spacing between the impeller blades of the two impellers of slightly less than the maximum size required. by an aggregate specincation in order to avoid further reduction of material already meeting the specification and' n order to increase the output of the breaker and to decrease the wear of the wearing members.

Qther reatures and advantages of our invention will become apparent to those skilled in the art upon consideration of the accompanying drawings and the following specification, wherein is disclosed an embodiment of our invention with the understanding however,-that ourdescription anddrawings are illustrative and diagrammatic in a broad sense and that changes in disposition and number of parts may be made without departing from the spirit f the invention. We therefore do not wish to be limited specifically to the device herein shown except to the extent fall within the scope of the appended'olaims.

In said drawings:

Fig. 1 is a side view of a double impeller impact breaker constructed in accordance with the teachings of the present invention;

Fig. 2 is part of a transverse sectional View thereof, on line 22, Fig. 1;

Fig. 3 is a fragmentary side view showing the impeller adjusting means taken on line 3--$, Fig. 2;

Fig. i is an enlarged fragmentary side view of the lower right hand side of the machine;

Fig. 5 is a horizontal section taken'substantially on line 5-5, Fig. 4;

Fig. 6 is a transverse vertical section takenuon line 5+6, Fig. 4.

Referring now to the drawings; since the breaker itself is well knownto those familiarwith the art, it is described in a fewdetails only, vsufficiently to support the novel features of .-our invention, which will be distinctly pointed out and more fully described as this specification proceeds.

In Fig. '1, ti! indicates 'a pairof spaced supporting members between whichthe breaker housing H is mounted. The breaker housing H is lined throughout with abrasion resistant liner 12 as the case with equipment of this type, in order to minimize the wear due to the action of the breaker during operation. An inlet or feed opening I3 is provided at the upper-end'ofthe breaker housing ii, a suitable feed chute ii is mounted over the feed opening it for the introduction of the rock-or ore .to be impacted. The round impact :bars is are disposed at both ends 'of the breaker housing I l .in a spaced relation with the ends and with one another, symmetrically around. a plane passing through the centerline-of thehousingand perpendicular to the spaced-supporting members it. The three lower impact bars 25 are adjustable in a horizontal direction by means of the bolt it. The two impellers H .are rotatably mounted, crosswise in an adjustable, spaced relation in the breaker housing 1 I, supported in the pillow blocks l8 and on the spaced supporting members it Below the impellers ll is provided a discharge opening 1:9 :for

the discharge. of the impactedrock more, which has passed downwardin the space between the impact bars and the ends of the breaker housing H or downward in the adjustable space between the impellers ll.

Referring now to, Fig. in the impellers H is inserted and heldin place parallel to"their.-c.enterlines, impeller blades 28, three in each -impeller, evenly spaced. The ends 'of the impeller shafts 2 l extend through the pillow blocks I 8 sac- ,commodating the necessary sheaves for :the standard prime mover, for the rotation of the impellers in such a direction, that the impeller blades 29 travel upward in a plane located between the impellers IT. The standard prime movers are not shown or described, assuming that any known unit may be utilized.

Referring now in particular to Fig. 3 considering the novel features of the atl ustable means for controlling the end to end clearance of the impeller blades 20, the impeller shafts 2| onto which the impellers H are keyed are rotatably mounted in the pillow blocks l8 as previously described. The supporting members It are provided with multiple slots 23 for adjustable clamping engagement of the pillow blocks I8, the through-bolts 24, and the clamping plates 25, the pillow blocks and clamping plates having holes matching the slots. On either side the pillow blocks, perpendicular to the supporting members 10, and in a spaced relation, providing for adjustment of the pillow blocks is is welded a gusset 22. Each gusset is provided with two laterally spaced openings 26 for threaded engagement with adjusting bolt 2] and locking means 28. In the edge of the supporting members I and the pillow blocks l8 are vertical lines 29, indicating the lower limit of approximately of the end to end clearance of the impeller blades 20, the maximum limit of approximately 6" spacing can be measured from these lines or a plate or other means with a scale and a pointer can be mounted as a help for getting the proper and desired location of the pillow blocks with the corresponding end spacing of the impeller blades.

From the foregoing, it will be seen, that we have provided a novel form of a double impeller impact breaker and especially a novel form of an adjustable mounting and adjustment of the impellers and the end to end clearance between the impeller blades.

In order to get a better and more complete understanding of the operation of the double impeller impact breaker and of our invention the following will describe the operation of the unit as utilized in a distinct method of impacting rock or ore with a controlled baffling of the downward moving material taking full advantage of the ad justment of the end to end clearance of the impeller blades.

After the primary blasting of the rock or ore to be impacted, it is transported to the double impeller impact breaker by the usual means and deposited at the feed opening. The rock or ore is then introduced into the breaker through the feed opening on top of the housing utilizing an apron feeder or other means. Dropping from the feed opening towards the impellers, spaced crosswise in the breaker housing and rotating at a high speed in opposite direction with the impeller blades moving upwards in a plane between the impellers, the rock or ore is impacted repeatedly, propelled upwards and impacted against the rock being fed into the breaker or against the spaced breaker bars. Finally the rock or ore is discharged through the discharge opening below the impellers. Should a check on the discharged material indicate a gradation outside the specification the end to end clearance of the impeller blades is adjusted, allowing more or less, as the case may be, of the material to pass downward between the impellers without being impacted.

What we claim is:

1. A stone breaker, comprising spaced supporting members, a casing mounted thereon defining a breaker chamber for the introduction of the stone to be reduced and for the discharge of the reduced stone, impellers having impact blades thereon disposed in opposing side by side relation in the lower portion of said casingchamber and spaced from the end walls of the casing, a series of spaced impact bars above the impellers and disposed along the end Walls of the casing in spaced relation thereto, adjustable pillow blocks for said impellers mounted on said supporting members, means applied to said members and operatively engageable with opposite sides of the pillow block for adjusting the impellers toward and from ach other for varying the end to end clearance between the opposing impeller blades in a plane parallel to a plane passing through the center lines of the impellers, and means adjustably mounted on said casing adjacent the end walls thereof for movement horizontally toward and from the companion impellers and having spaced impact bars thereon disposed in the spaces between the impellers and the casing walls and constituting a continuation of said series of impact bars.

2. In a rock crushing apparatus, a casing defining a breaking chamber having upper and lower openings therein for the introduction of the stone to be reduced and for the discharge of the reduced stone, a pair of bladed impellers disposed in side by side relation in the lower portion of said chamber in spaced relation to the end walls thereof, means operatively connected to said impellers for adjusting the end to end clearance between the blades thereof in a plane parallel to a plane passing through the center line of the impellers, impact bars disposed immediately over the impellers at opposite sides of the vertical plane between the impellers, a series of vertically-spaced impact bars paralleling the end walls of the casing in spaced relation there to and to said bars over the impellers and extending upwardly from a point substantially 0pposite said last-named bars to the top of the casing, means adjustably mounted on said casing adjacent the end walls thereof for movement horizontally toward and from the companion impellers and having spaced impact bars thereon disposed in the spaces between the impellers and the casing walls and constituting a continuation of said series of impact bars.

NORMAN H. KESSLER. HANS I. HANSEN.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 748,536 Schoellhorn et al. Dec. 29, 1903 2,036,522 Armstrong Apr. '7, 1936 2,095,385 Hersserman Oct. 12, 1937 2,373,691 Kessler Apr. 17, 1945 2,463,631 Knight Mar. 8, 1949 2,486,421 Kessler Nov. 1, 1949 

